Screw clamp



Jan. 13, 1931'. A. SCHMIEDER 1,788,546

SCREW CLAMP Filed Nov. 21. 1929 law mill/014 2 "r .1!" I INVENTOR. Alfred .fclzmz'cder V vide a device of the character specified in Patented Jan. 13, 1931 r m TNT oer-Ice ALFRED .sonmnnnn; or MASPETH, new YonK sc'nnw CLAMP Application fi lefl 'Novem-lier 21, 1929. Serial No. 408,692.

My invention relates toimprovements; in means for clamping .parts'inzposition lZO'ftlCllltate the securementor workingthereof, such as in the art of woodworking, and the same has for its .objectto provide a simple etficient and reliable device-which-is readily manipue lated andsecuredinposition to exert a'clamping action alonga plurality. of {lines of direction, or at a pluralityxof points.

Another object of the invention is to prowhich certain ofthe clamping components thereof are capable o=fvbeing relatively moved to exert conjoint'ly 1a third z-clampingfaetion along a -line of directioncextending trane versely relative to the lines of direction of said claimping componehts- Another object of the invention is "to provide'a device of/t'he character specified in nectedrto apair ofordinary clamps 'forcausing positive movement thereof towards :each

in part be pointedx'outhereinafter In theaccompanyingdrawing: 1.5 r a Figure 1*s axplanrofcone form of device constructed accordingito and embodying my said invention; a. l f

:Fig. 2 :is an.elevationithereofihv. Fig. 3 is a view showing amodifiedrform of supplemental clamping component; {and i Fig. 'is 'a detail viewpartly in section! 7 Referring to the drawing the clamping.

means includes a pair iofprdinary clamps l0 and 12, each comprising a standard 14 having a 'lower'iarm- 16 secured thereoirand upperarm 18 slidable thereon. The outer end of lower arm 16'is provided with a'universally swiveled abutment member 20 adapted to engage a 'p'ieceor member 110' be which. an attachment may beg-readily con.- 7

clamped and the outer'end of theupper arm 18 is provided with a screw 22 threaded therethrough and having a universally swiveled abutment 24 cooperating with the abutment 20. stant-ially alike in construction The clamps l0 and 12'are connected together by means 28 for moving the clamps towards each other to conjointly exert a clamping action along a transverse line. The connecting means 26 includes a pair of arms 28 and 30pr'eferably providedwithhook-like or slotted end portions-'32'and 34; adapted toembrace the standards 14 to extend laterally towards each other and secured to the stand-. ards by the set 'screws 36. The means 26 may be adjusted along and secured to -the standards at various points relative to the work sothat the workdoes not interfere with the operation of the device. The member 30 is pivoted at 38 intermediate the ends thereof to the member 28 near the outer end of the latter, and extends transversely of the member 28 and rearwardly beyond the same.

The outer end oithe arm or'member 30 carries aunutfeO swiveled on the pivot 42. A clamping screw 44: passing through and cooperating with the nut vtO is connected at the outer end 46 thereof to the arm 28 contiguous to the-inner end thereof, said end 46 being rotatably retainedin the swiveled meniber LS pivoted at50 on arm 28. p

Supplementary -or au'xiliary clamping is. also obtained clamping component 52 constituting an attachment which may be secured-to either standard llby means of the nutfie' havinga slot 56 adapted to engage ;-the standard 14, andsecured thereto 'by a screw v58. 1 clamping screw 60 passes through thewnut54 and is, provided with V jaruniversally: movable abutment 62 at the outer "end ithereo'f. The clamping )means 52 The two'clamps 10 and 12- are. subprovides the fourth clampingcomponent and v exertsraiclamping action along a line extendlng transversely oft-he'li'nes of clamping actionpo'f the other three clamping comb0nent i.",

,As shownat 3 'the' fourth clamping i component- 52 may include a nut portiont l having a standard engaging slot 56 extendi ing parallel with the threaded opening 66 and a standard engaging slot 68 extending at an angle to the opening 66. By securing the means 52 to either standard 14 through slot 68, the clamping action is exerted at an incli nation relative to the work. Bysecuring the means 52'? to the standard through slot 58 the clampingaction is exerted normally relative to the work. c

In operation, theactuating means 26 are readily secured to the clamping components 10 and 12 by engaging the slotted portions 32 and 34 with the standards it and securing the same by set screws 3- 1.; Theclamping compohentslO and 12 are then engaged with the work, such as, for example, the pieces or members A and B, by adjustment of the screws 22. By rota-ting thescrew M the clamping components 10 and v 12 movetowards each other to exert a third clamping action along a transverse line and cause the pieces or members A and B to 'be firmly pressed into engagement'with each'other at the contiguous edges C thereof. I

In my invention the clamping components 10 and 12 therefore-form conjointly a. third clamping component, thereby rendering the device more universal and flexible and enlarging the usefulness thereof. l/Vhen remay be secured in position on either standard 14 and the screw 44 thereof adjusted toclamp the member or piece D to retain the same in engagement with the pieces A and B. Then it is necessary to operate the fourth. clamping component at an angle, for example, as shown at Fig. 3, as when an angular piece E is employed, the component 52 is employed and secured to the standard 14: through inclined slot68. 1 a

My device may be readily manipulated and secured in position, and provides three or four different clampings as required. The working or securementof, the pieces-is there by-greatly facilitated and the device may be employed; in connection with types of work forwhich the individual clamps 10sor 12 are inadequate, thereby providing a device having an enlarged range of usefulness, and particularly in connection with the fabrication of veneered articles; or in connection with working u on curved surfaces.

Having thus c escribed my invention'what I I claim and desireto secure by Letters Patentisr, o 7

1; A device of the character described comprising a plurality of clamps, reach" in- .cluding a -standard, arms; projecting from said standard and slidable thereon relative to each other, and relative adjustable'clamping members carried by the outer vend of said arms,"and-a pivotal connection between said standards intermediate said arms for allowing the swinging of said clamps towards each other to exert a transverse clamping action, and actuating means for swinging the clamps about the pivotal consaid standards forsli'ding adjustment longitudinallythereof and providing a pivotal connection betweensaid clamps for allowing movement thereof towards each other to exert a transverse clamping action.

3. A device ofithe character described comprisingfa plurality of clamps, each ins cluding relatively adjustable clamping members adapted @to exert a clamping action along a certain line of direction, a pivotal connection between said clamps, and a screw carried by said connection and connected with relatively movable parts thereof for swinging said clamps'to exert a transverse clamping action,-'said screw being connected to said parts to extend forwardly between said clamps at an angle to the direction of the transverse clamping action.

r '4. A. device of the'character described comprising a. plurality'of-clamps including standards and clamping members thereon adjustable relative toeach other, and means connected to said standards and including relative movable partsproviding a pivotal connection between said clamps for swinging thevsame towards each other to exert a transverse clamping action, "swiveled memberson saidrparts one in advance of the other on a line intermediatesaid standards and a screw cooperating with said swiveled members for actuating said clamps. 1 '5 A device of the character described comprising a pair of clamps, each including a standard and relativelyadjustable clamping members thereon for exerting a clamping aotionin a certain-line of direction, and means connecting said clamps for allowing movement thereof towards each otherto exert a'itransverse clamping action,

and including portions engaging'said stand ards for sliding adj ustment' longitudinally thereof and a pivotal portion --intermediate said first named portions, and actuating means carried by-s'aid'connecting means and cooperating with the relative movable parts thereof; 7 Y. 7

6. A'device of; the character described comprising a pair of :clamps, each "including a standard; annszprojecting from said standard fandslidableirelative to each other lon-- 'gitu'dinally of the standard, an d relatively adjustable clampingm'embers at the outer sends ofsaid arms, and a pivotalconnec'tionbetween said clampscincluding' portions engaging said ;standards .for sliding: ustrnent I longitudinally thereof, and a screw carried by said connection and cooperating with the relatively movable parts thereof for moving said clamps to exert a trans verseclamping action. r

7. A device of the character described comprising a pair of clamps including standards, arms connected to said standards and extending towards each other, oneof said arms being pivoted centrally thereof to the other arm contiguous to the free end thereof and extending rearwardly relative thereto, swiveled members carried by said arms, and a clamping screw coacting With said swiveled members for controlling the angular relation of said arms, and serving to move said clamps toward each other to exert a clamping action.

8. A device of the character described comprising a pair of members having slotted portions at theouter ends thereof for detachably engaging the standards of a pair of clamps, one of said members being pivoted centrally thereof to the inner end of the other memof sliding adjustment,'and a screw carried swinging movement.

12. A device of the character described, a pair of clamps, each includinga standard, a fixed arm, a sliding arm, and relatively adjustable clamping members at the outer ends of the arms, and an attachment'for moving the clamps towards each other to exert a transverse clamping action including slotted portionsengaging the standards for sliding adjustment thereon between said arms, and a connection between said slotted portions a1- lovving relative movement thereof, and includ: ing ascrew-carried by the attachment and enacting-With the relatively movable. parts thereof for effecting the movement thereof. In testimony whereof, I have signed my name hereto. j V

i I ALFRED SCHMIEDER.

her and extending rearwardly thereof, a

swiveled nut on-the inner end of the centrally pivoted member, a clamping screw coacting therewith, and a swiveled member onsaid other member adjacent the outer end 7 thereof and rotatably retaining said screw connected thereto.

9. A device of the character described comprising an auxiliary clamping means for a clamp including a nut having a threaded i opening therein and slots disposed at opposite sides of said opening and adapted to engage the standard of said clamp, one of said slots being disposed in parallelism w'ith the axis of said opening and the other of said for'efli'ecting said movement.

slots being disposed at an inclination there-. to, means for securing the nut tothe stand ard, and a clamping screw extending through the opening. f

10. A device of the character described comprising an attachment for moving clamps towards each other to exert a third clamping action including slotted portions at the outer ends thereof adapted to engage the standards of the clamps for sliding adj ustment longitudinally thereof, a pivotal connection between the slotted portions having the pivot thereof disposed parallel to the direction of sliding v adjustment of the attachment, and a screw carried entirely by the attachment and 'coacting with the relatively movableparts thereof, A

.11. A deviceof the-character describ d comprising an attachment *for' swinging j 'clamps towards each other toexert a third.

clamping action" including slottedtportions I at the outer ends-thereof adapted toengage j the standards of the clamps for sliding longitudinal adjustment thereon, and arms extend ing inwardly therefrom and'pivote'd together on an axis disposed parallel to the direction 

